Idiocera (Idiocera), 1842

Starý, Jaroslav, 2020, Two new Idiocera Dale from the Mediterranean (Diptera: Limoniidae), Zootaxa 4803 (1), pp. 177-182 : 181

Key to European Idiocera (Idiocera) (males)

1. Wing without any pattern except for faint stigma............................................................ 2

- Wing pattern brown to dark brown....................................................................... 7

2. Male terminalia with four separate gonostyli............................................................... 3

- Male terminalia with three separate gonostyli............................................................... 5

3. Wing with R 3 connected with R 1 at wing margin; male terminalia with second gonostylus sickle-shaped ( Figs 1 , 3 ). Spain..................................................................................... I. (I.) falcistylus sp. n.

- Wing with R 3 mostly ending about its half-length beyond R 1; male terminalia with second gonostylus dilated apically into subcircular blade terminating in acute spine................................................................... 4

4. Wing with m-cu about 1½ times its own length before fork of M; male terminalia with all gonostyli rather long, three of these longer than half length of second gonostylus. Greece; Armenia, Turkey; Iran.......... I. (I.) laterospina (Alexander, 1975)

- Wing with m-cu about its own length before fork of M; male terminalia with three gonostyli shorter or subequal in length to second gonostylus. Albania, France ( Corsica), Italy, Romania; Turkey.......... I. (I.) alexanderiana (Lackschewitz, 1940)

5. General body colouration yellow; male terminalia with apex of aedeagus provided with lateral projections. Finland; East Palaearctic. (Identity of Finnish specimens should be checked)........................... I. (I.) pallens (Alexander, 1928)

- General body colouration dark, greyish brown; male terminalia with apex of aedeagus simple, without lateral projections ... 6

6. Male terminalia with outer and intermediate gonostyli subequal in length. Austria, France, Germany, Switzerland........................................................................................ I. (I.) connexa (Loew, 1873)

- Male terminalia with outer gonostylus about half length of intermediate one. Scattered records from Europe (incl. Canary Is.); North Africa; Yemen....................................................... I. (I.) sziladyi (Lackschewitz, 1940)

7. Wing pattern consisting of faint stigma and narrow, brown seams along (sub)vertical vein elements. Scattered records from Europe; Georgia.............................................................. I. (I.) bradleyi ( Edwards, 1939)

- Wing with R 4 strongly upturned distally; wing pattern consisting of conspicuously dark brown seams, sometimes other spots. ................................................................................................... 8

8. Wing with row of nearly quadratic spots in costal cell........................................................ 9

- Wing without these spots.............................................................................. 10

9. Male terminalia with outer gonostylus sometimes serrate distally and aedeagus enlarged in proximal half. Czech Republic, Denmark, Great Britain.......................................................... I. (I.) sexguttata (Dale, 1842)

- Male terminalia with outer gonostylus smooth and aedeagus slender. Scattered records from Europe (incl. Canary Is.), North Africa; Near and Middle East .................................................. I. (I.) pulchripennis (Loew, 1856)

10. Male terminalia with aedeagus only slightly enlarged before apex and obtuse at tip without any lateral projections. Albania, Greece, Italy (Sicily), North Macedonia.......................................... I. (I.) lackschewitzi ( Starý, 1977)

- Male terminalia with aedeagus different in shape and provided with various lateral projections....................... 11

11. Male terminalia with aedeagus stout, conspicuously dilated before apex, with very long, slender and darkly pigmented lateral spines subequal in length to aedeagus and directed posterodorsally. France ( Corsica), Italy (Sicily)................................................................................................... I. (I.) antilopina Starý, 1982

- Aedeagus with shorter lateral projections................................................................. 12

12. Male terminalia with aedeagus provided with triangular lateral projections directed lateroventrally. Bulgaria............................................................................................... I. (I.) hasta Starý, 1982

- Aedeagus with lateral projections directed posteroventrally................................................... 13

13. Aedeagus powerful, conspicuously dilated distally. Greece (Crete).......................... I. (I.) cretopunctata sp. n.

- Aedeagus more slender and less dilated. Scattered records from Europe; Azerbaijan;? Afghanistan. (For other details of latter two species, see Figs 4–7 )...................................................... I. (I.) punctata (Edwards, 1938)

Figures

FIGURES 1–2. Wing (paratypes). 1: Idiocera (Idiocera) falcistylus sp. n.; 2: I. (I.) cretopunctata sp. n. Scale bar = 1.0 mm.

FIGURES 3–7. Male terminalia. 3: Idiocera (Idiocera) falcistylus sp. n., (paratype), general view, dorsal; 4–5: I. (I.) cretopunctata sp. n. (paratype), general view, dorsal (4) and outer gonostylus, lateral (5); 6–7: I. (I.) punctata (Edwards, 1938) (Czech Republic, Radějov), outer gonostylus, lateral (6) and aedeagus, dorsal (7). Scale bar = 0.25 mm.